Malicious PDF — malware analysis report

Static analysis result for SHA-256 7712bc4e85545f9f…

MALICIOUS

PDF

43.2 KB Created: 2020-08-09 02:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82eca5b90d93abf0bf1ca08566ac3472 SHA-1: a56ee9e6acfbacf7e8f40215d18f1a6f66cedb40 SHA-256: 7712bc4e85545f9fbab84c61f6e6872c6bd94cdd02a891f8d00b5896730b84c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one prominent link leading to a redirector service that hosts a lure for downloading 'Asterix and Obelix comics PDF free download'. This suggests a phishing or scam attempt to trick users into downloading further malicious content. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=asterix+and+obelix+comics+pdf+free+download
    • http://files.obsgynatlantic.ca/uploads/1/3/2/6/132682335/dunovasepopu_rexijimijipidi.pdf
    • http://files.flyingsamaritanselhongo.org/uploads/1/3/0/7/130739328/pagalegapabuvu.pdf
    • http://files.olivetgroup.com/uploads/1/3/0/7/130740429/pobaxanu_norixujubawujud_nediwewina.pdf
    • http://suposev.myped15.com/uploads/1/3/0/8/130873995/xowikegisedasej.pdf
    • http://dolegat.oesubmuact46.org/uploads/1/3/2/7/132740405/7163994.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/difference_between_cdna_library_and_genomic_library.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7431/files/298648014.pdf
    • https://cdn.shopify.com/s/files/1/0435/5856/8097/files/3961198086.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/mujulekomopuzedosexamudit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4090/6135/files/rower.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/dofogikemavezabolulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1130/files/platform_technology_in_pharmaceutical.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/64572056071.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/joranaden.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1767/files/caltrans_highway_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/avantages_et_inconvnients_des_nergies_renouvelables_tableau.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/pisijisudiwutomisagim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3f.bin
408c8f14aa839a601f88dd192932033fa5152b22981f89a9b35c5530946de634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3F 5380 bytes
font_01_sfnt_off00006e7b.bin
2b98a5f6498c56b7f26f71a31e4c5a3525cc55dbe328f10505a84b9113e1d8ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7B 10312 bytes
font_02_sfnt_off00009186.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9186 4324 bytes

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